python3: bump to version 3.4.3

All patches are simply refreshed, except
002-properly-detect-if-python-build.patch which is removed because an
identical fix has been merged upstream:

  e128ea78e5

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python3/111-optional-decimal.patch

@@ -12,7 +12,7 @@ Index: b/configure.ac
 ===================================================================
 --- a/configure.ac
 +++ b/configure.ac
-@@ -2402,13 +2402,20 @@
+@@ -2405,13 +2405,20 @@
  AC_MSG_RESULT($with_system_ffi)
  
  # Check for use of the system libmpdec library
@@ -42,7 +42,7 @@ Index: b/setup.py
 ===================================================================
 --- a/setup.py
 +++ b/setup.py
-@@ -1980,7 +1980,7 @@
+@@ -1968,7 +1968,7 @@
      def _decimal_ext(self):
          extra_compile_args = []
          undef_macros = []